/*
 * Copyright 2014 Attila Szegedi, Daniel Dekany, Jonathan Revusky
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package freemarker.ext.jsp;

import javax.servlet.Servlet;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.jsp.JspEngineInfo;
import javax.servlet.jsp.JspFactory;
import javax.servlet.jsp.PageContext;

/**
 */
abstract class FreeMarkerJspFactory extends JspFactory {
    protected abstract String getSpecificationVersion();
    
    @Override
    public JspEngineInfo getEngineInfo() {
        return new JspEngineInfo() {
            @Override
            public String getSpecificationVersion() {
                return FreeMarkerJspFactory.this.getSpecificationVersion();
            }
        };
    }

    @Override
    public PageContext getPageContext(Servlet servlet, ServletRequest request, 
            ServletResponse response, String errorPageURL, 
            boolean needsSession, int bufferSize, boolean autoFlush) {
        // This is never meant to be called. JSP pages compiled to Java 
        // bytecode use this API, but in FreeMarker, we're running templates,
        // and not JSP pages precompiled to bytecode, therefore we have no use
        // for this API.
        throw new UnsupportedOperationException();
    }

    @Override
    public void releasePageContext(PageContext ctx) {
        // This is never meant to be called. JSP pages compiled to Java 
        // bytecode use this API, but in FreeMarker, we're running templates,
        // and not JSP pages precompiled to bytecode, therefore we have no use
        // for this API.
        throw new UnsupportedOperationException();
    }
}